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An Introduction to Object-Oriented Programming with Java5th Edition

Chapter
Problem

Define a class called Triangle that is capable of computing the perimeter and area of a triangle, given its three sides a, b, and c, as shown below. Notice that side b is the base of the triangle.

The design of this class is identical to that for the Ch5Circle class from Section 5.1. Define a private method isValid to check the validity of three sides. If any one of them is invalid, the methods getArea and getPerimeter will return the constant INVALID_DIMENSION.

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